Maintains serrated edges and serves as a mini-steel, gut hook sharpener and conical file. The taper of the sharpener measures 1/4″ at its widest point down to 1/16″ at it’s narrowest. Convenient size measures 9-1/2″ open and 5″ closed. Folding plastic handles protect sharpener when not in use. Sharpens in a fraction of the time required by conventional stones. No messy oils needed — sharpen dry or with water. Durable construction will provide years of consistent performance and reliable service. Coarse diamond (45 micron / 325 mesh) quickly restores a neglected edge.